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[[File:Stormwater planter pu.png|thumb|An above ground planter with downspout and overflow illustrated.]]

[[File:Stormwater planter pu.png|thumb|An above ground planter with downspout and overflow illustrated.]]

Over subsurface infrastructure, soils prone to subsidence, or pollution hotspots, it may be necessary to prevent all [[infiltration]]. These BMPs can also be squeezed into tight urban spaces, adjacent to buildings and within the usual setbacks required for infiltrating facilities. Stormwater planters can also be used as a means of providing building-integrated LID by capturing a portion of the rainwater from the rooftop.  

Over underground infrastructure, soils prone to subsidence, or on sites considered to be pollution hot spots, it may be necessary to prevent all [[infiltration]]. Stormwater planters are "filtration-only" BMPs, similar to bioretention cells, that can be squeezed into tight urban spaces, adjacent to buildings and within the usual setbacks required for infiltrating facilities. Stormwater planters can also be used as a means of providing building-integrated LID by capturing a portion of the rainwater from the rooftop.  

This type of cell can be constructed above grade in any waterproof and structurally sound container, e.g. in cast concrete or a metal tank.

This type of cell can be constructed above grade in any waterproof and structurally sound container, e.g. in cast concrete or a metal tank.

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*Zero-lot-line developments such as condos or dense urban infill.}}

*Zero-lot-line developments such as condos or dense urban infill.}}

'''The fundamental components of a stormwater planter are:'''

'''The fundamental components of a stormwater planter are:'''

*a planting bed of [[storage media]],

*a planting bed of [[Filter media| filter media]],

*suitable vegetation,

*suitable [[Plant lists| vegetation]],

*decorative aggregate or [[stone]],

*decorative aggregate or [[stone]],

*An [[underdrain]]

*An [[underdrain]],

'''The design may benefit from:'''

'''The design may benefit from:'''

*A [[level spreaders| level spreader]]  

*A [[level spreaders| level spreader]]

 

==Planning Considerations==

==Planning Considerations==

Stormwater Planters are a type of bioretention practice. Please defer to planning considerations in [[Bioretention]]

Stormwater planters may be integrated into the landscape similarly to bioretention practices. See [[Bioretention#Planning considerations|bioretention planning]].

As they do not require connection to the earth for infiltration purposes, stormwater planters can also be used in elevated locations. They are sometimes used in retrofit applications on otherwise impermeable surface, as raised beds or planters surrounding buildings. They can be employed to capture runoff from [[downspout disconnection| roof drains or downspouts]] or even upon terraces or vertical surfaces of buildings.

==Design==

==Design==

{{:Planters: Sizing}}

{{:Planters: Sizing}}

===Storage media===

===Filter media===

[[filter media]]

See [[Bioretention: Filter media]]

===Underdrain===

===Underdrain===

Stormwater planters differ from full and partial infiltration [[bioretention]] in that the storage function is provided only by the [[water retention capacity]] of the [[filter media]]. As such there is no storage reservoir and the only purpose to the aggregate layer is to drain water to the perforated [[pipe]]. For this, a medium aggregate as described in [[choker layer]] is recommended as it negates the need for a separating layer to the filter media. Design details can be found here n [[Underdrains#Underdrains for non-exfiltrating practices|Underdrain]] for non-exfiltrationg practices.

Stormwater planters differ from full and/or partial infiltration [[bioretention]] practices in that the storage function is provided only by the [[water retention capacity]] of the [[filter media]]. As such, there is no storage reservoir and the only purpose to the aggregate layer is to drain water to the perforated [[pipe]]. For this, a medium aggregate as described in [[choker layer]] is recommended as it negates the need for a separating layer to the filter media. Design details can be found here  [[Underdrains#Underdrains for non-exfiltrating practices|Underdrains]] for non-exfiltrationg practices.

===Planting===

===Planting===

{{:Liner}}

{{:Liner}}

==Surface==

==Filter bed surface==

As stormwater planters are often quite small and receive very rapid flow, both a [[level spreader]] and the use of [[stone]] mulch are strongly recommended.

As stormwater planters are often quite small and receive very rapid flow, both a [[level spreader]] and the use of mulch and stone to dissipate energy from concentrated inflow are strongly recommended.

==Gallery==

==Gallery==

==Performance==

==Performance==

===Hydrology===

===Hydrology===